There are two updates in this weeks calibre release.
Firstly, the supported firmware has been updated to 3.1.0. There were no other changes needed.
The other change is to put the support for sending kepubs to Kobo ereaders into the KOBO driver. This will allow people using the original Kobo and the Kobo WiFI to sideload kepubs. The kepubs can be produced using the KePub Output Plugin
. Thanks to Greenmantle for testing that sideloaded kepubs did work on these ereaders.